Question

Cov(X,Y) = 12, then Cov (X – 4, Y+ 5) is,

Answer 1

Answer:

From the definition of Covariance

Cov(aX + b, cY + d) = acCov(X, Y )

So

Cov( X-4, Y+5) = Cov(X,Y) = 12

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